Magazine feed-drum for magazine-firearms.



No. 801,802. PATENTED OCT. 10, 1905.

F VON MANNLIGHER, DEGD.

O. VON MANNLIOHER, ADMINISTRATBIX.

MAGAZINE FEED DRUM FOR MAGAZINE FIREARMS. APPLICATION FILED MAY 22. 1905.

ml II I nNrrnn s'ra'rns PATENT onrion.

CACILIE VON MANNLIGHER, OF VIENNA, AUSTRIA-HUNGARY, ADMINIS- TRATRIX OF FERDINAND VON MANNLICHER, DECEASED.

MAGAZINE FEED-DRUM FOR MAGAZINE-FIREARMS.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Original application filed February 23,1904, $erial No. 195.504. Divided and this application filed May 22, 1905. Serial No. 261,655.

To all 1077/0710 it may concern:

Be it known that FERDINAND BITTER VON MANNLIOHER. deceased, late a subject of the Emperor of Austria-Hungary, and a resident of Vienna,Empire of Austria-Hungary, did in vent certain new and useful Improvements in Magazine Feed-Drums for Magazine-Firearms, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to magazine feeddrums for magazine-firearms with reciprocating bolt. and has for its object to provide a magazine feed-drum which may be readily taken to pieces for inspection and cleaning and then put together again.

This application is a division of Ferdinand Ritter von Mannlichers application, Serial No. 195,504, filed February 23, 1904.

In the accompanying drawings, Figure 1 is a side elevation of the improved magazine feed-drum in position in the magazine-casing, the latter being shown in section and the other parts of the arm being broken away. Fig. 2 is a longitudinal section of the spindle of the improved magazine feed-drum. Fig. 3 is a section on the line A B, Fig. 2, viewed in the direction of the arrow (4, thedrum be-. ing omitted. Fig. 4 is an end view of the magazine feed-drum as seen from right of Fig. 2. Fig. 5 is a section on the line C D, Fig. 2, viewed in thedirection of the arrow 6, Fig. 2; and Fig.6 shows part of the inner surface of the bore of the drum spread out in a plane. Figs. 2 to 6, inclusive, are drawn to a larger scale than Fig. 1.

The drum 1. is provided at its rear end with a round journal-pin 2, working in a bearing 3 at the bottom of the magazine-casing, which bottom is pivoted on the fixed pin 4. The front end of the drum is bored out for receiving a spindle 5, Figs. 2 to 5, provided with a key 6, adapted to engage into a keygroove in the drum, so that the drum must turn with the spindle. The latter is, moreover, provided with a collar 7, having a circumferential groove 9 cut into it, which at one place is interrupted by a stop 8.

The front wall of the groove is out through, as at 10, at a point distant from (as shown nearly diametrically opposite to) the stop 8. To the front end of the spindle a spiral spring 11 is secured. A sleeve 12 is so placed on the front end of the spindle 5 that an inwardlyprojecting stud 13 on the inner side and near the front end of the sleeve 12 comes into contact with the front side of the collar 7 and that the sleeve comes into engagement with the free end of the spring 11, Fig. 3, such free end of the spring 11, which acts as a torsion-spring, being suitably bent and entering into a corresponding recess in the body of the sleeve, as shown in Fig. 2. The sleeve isthen turned around the spindle in the direction of the arrow, Fig. 3, whereby the spring is put under tension until the stud 13 comes opposite the opening 10 in the front wall of the groove 9, and then the spindle is forced into the sleeve until the stud has fully entered the groove. The spring being under tension then turns the sleeve around the spindle in a direction opposite to that indicated by the arrow in Fig. 3 until the stud 13 strikes against the stop 8 in the groove 9, as shown in Figs. 2, 4, and 5. As the sleeve in this latter movement does not turn through the whole angle through which it has been turned in the direction of the arrow, Fig. 3, the spring 11 has in the position of the parts shown in Figs. 2 and 4 a certain initial tension and holds the stud 13 against the stop 8 with a force which may be varied by properly selecting the angular distance between the opening 10 and the stud 13 in the position of the parts shown in Fig. 3. The spindle and the sleeve are then so firmly connected the one with the other that they may be handled without any risk of accidental separation. The whole is then inserted spindle foremost into the bore at the front end of the. drum 1 until the key 6 on the spindle comes against an incline 14 at the front end of its key-groove in the drum, as shown in Fig. 6 in full lines, and a key 16 on the sleeve 12 enters a notch 17 in the inwardly-projecting flange 18 at the front end of the bore in the magazine-drum 1. On then forcing the spindle and the sleeve inward into the bore of the drum the spindle is first turned in the sleeve against the action of the spring 11, the inner end of the key 6 sliding along the incline 14 and the sleeve being prevented from turning in the drum by the key 16 engaging into the notch 17. WVhen the key 6 has entered the key-groove 15, both the sleeve and the spindle move forward in the drum straightly, being guided by the keys 6 and 16 engaging into the keygroove'15 and the notch 17, respectively; but when finally the key has come completely inside the flange 18 the spring 11 turns the IIO sleeve 12 in the drum, (which is then free to do S0,) the key 16 having come out of engagement with the notch 17 in the flange 18, so that the key 16 abuts against a full portion of the flange 18, as indicated in dotted lines in Fig. 6. The drum, the spindle, and the sleeve are then so firmly held together that they may be safely handled. The round journal-pin 2 of the drum is then placed into its bearing 3 on the bottom plate of the magazine-casing, and the projection 19 (the cross-section of which is preferably a flat rectangle) at the free end of the sleeves 12 is pushed from above into a corresponding slot in the standard 20 on the bottom plate of the magazine-casing, so that this sleeve is prevented from turning in the magazine, While the drum 1 together With the spindle 5 are free to turn relatively to the sleeve 12. When the cartridges are introduced from above into the magazine, the drum is charged with these cartridges in the manner usual With drum-magazines, being turned, together With the spindle 5, in one direction against the action of the spring 11, the tension of the same being increased. The stepby-step rotation of the drum in the opposite direction under the action of the spring causes the cartridges carried by the drum to be raised one by one into the path of the breech-bolt in the Well-known manner, and the movement of the drum is stopped after each step likewise in the Well-known manner, the topmost ridge on the drum coming against a spring-stop (not shown) provided in the breech-casing. Owing to the initial tension imparted to the spring 11, as above described, the drum raises With certainty even the last cartridge into the path of the breech-bolt. In order to remove the drum, together with the spindle 5 and the sleeve 12, from the magazine-casing and to separate the spindle from the sleeve, the operations above described have to be repeated in the reverse order.

What is claimed is 1. In combination with the spindle of a mag azine feed-drum for magazine-firearms, a collar on such spindle, a circumferential groove in such collar, a stop in such groove, an opening in the front Wall of such groove and angularl y distant from such stop a spring secured to the spindle, a sleeve adapted to be slipped over the spring and to come into engagement with the same at a predetermined position, an inwardly-projecting stud at one end of the sleeve adapted to enter into the groove through the said opening in the front Wall of the same, the angular distance between the said stud and such opening measured in one direction being greater at that aforesaid predetermined position of the sleeve than the angular distance between such opening and the said stop in the groove measured in the opposite direction, substantially as and for the purpose described.

2. In combination With a magazine feeddrum for magazine-firearms, a spindle, a key on the same, a sleeve and a spring under initial tension interposed between the spindle and the sleeve, means for preventing such spring under initial tension from turning the sleeve relatively to the'spindle in one direction, a key on such sleeve, a key-groove in the magazine-drum adapted to receive the key on the spindle, an incline in front of such key-groove, an inwardly-projecting flange at the front end of the drum and a notch in such flange adapted to guide the key on the sleeve substantially as and for the purpose described.

In testimony whereof I aflix my signature in presence of two Witnesses.

CACILIE VON MAN N LICHER, Admin stmtm'x 0f the estate of l crdmrmpl con ilflmnlz'c/wr, deceased.

Witnesses:

JOHN GEORGE HANDY, ALVESTO S. HOGUE. 

